Tempest43 :
Intel I7 4790k 4.0 GHZ Quad Core I know I don't need to I just want to know if I could and should
Alright, time to answer.
Can you OC it? Yes. Should you? In my opinion, if you do it right, yes. How much? That depends on your CPU and your system's airflow.
I'm probably conservative when it comes to temperature, but I like to think ''better safe than sorry.'' My personal way to be satisfied, when I was setting up my I5-4690k was no more than 70 degrees Celsius after 10 minutes running Prime95 Small FFTs. This test will show the real temperature limit that your CPU could reach, but you won't be getting these temperatures while using your computer in any other way. I ended up at 4.6Ghz using my H80i GT cooler, because, even though it got to 71 degrees Celsius for a second, it went back and stayed at 69-70 degrees. Most people say that on this test, it's ok if it maxes out in the low 80's, but I'm not that brave.
Thanks to what is referred to as ''silicon lottery'', it's impossible to know in advance what your CPU's actual limit is, and the only way to know is to try it yourself. I've made a small guide for someone on how to OC on an Asus motherboard once, but I've never been on an MSI mobo before, so I don't know how similar it will be.
I'll still leave the link here, but if it's too different, there are plenty of tutorials out there.
http://www.tomshardware.com/answers/id-2945069/high-cpu-core-voltage-default-finished-installing.html